420
FNCA52 TJSJ 200730
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 AM AST MON APR 20 2026
DISCUSSION
NO FIRE DANGER IS EXPECTED TODAY.
PRZ014-202000-
SOUTHEAST COASTAL PLAINS-
330 AM AST MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 30 10 50
TEMP (24H TREND) 88 (+3) 69 (-3) 88
RH % (24H TREND) 47 (-17) 88 (+3) 49
WIND 20FT/EARLY(MPH) E 16 E 12 E 12
WIND 20FT/LATE(MPH) E 16 NE 10 SE 13
MIXING HGT(FT-AGL/MSL)5240 4880
TRANSPORT WND (MPH) E 15 E 9
VENT RATE (KT-FT) 68120 39040
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-202000-
SOUTHERN HILLS-
330 AM AST MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 30 20 70
TEMP (24H TREND) 84 (+4) 66 (-3) 84
RH % (24H TREND) 60 (-11) 95 (+5) 58
WIND 20FT/EARLY(MPH) E 13 E 10 E 9
WIND 20FT/LATE(MPH) E 12 NE 11 SE 10
MIXING HGT(FT-AGL/MSL)5440 5590
TRANSPORT WND (MPH) E 12 E 8
VENT RATE (KT-FT) 54400 39130
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-202000-
NORTH COASTAL PLAINS-
330 AM AST MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 20 20
TEMP (24H TREND) 87 (+2) 69 (-2) 87
RH % (24H TREND) 58 (-8) 96 (+5) 56
WIND 20FT/EARLY(MPH) E 14 E 14 E 9
WIND 20FT/LATE(MPH) E 14 SE 10 NE 13
MIXING HGT(FT-AGL/MSL)5340 5060
TRANSPORT WND (MPH) E 14 E 8
VENT RATE (KT-FT) 64080 35420
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-202000-
NORTHERN HILLS-
330 AM AST MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 70 20 40
TEMP (24H TREND) 86 (+3) 66 (-3) 85
RH % (24H TREND) 61 (-7) 96 (+3) 58
WIND 20FT/EARLY(MPH) E 12 E 11 E 8
WIND 20FT/LATE(MPH) E 12 SE 8 NE 11
MIXING HGT(FT-AGL/MSL)5240 5850
TRANSPORT WND (MPH) E 13 E 5
VENT RATE (KT-FT) 57640 23400
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-202000-
WEST COAST-
330 AM AST MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 50 50 80
TEMP (24H TREND) 88 (+1) 69 (-1) 87
RH % (24H TREND) 59 (-7) 94 (+3) 58
WIND 20FT/EARLY(MPH) E 13 E 11 E 9
WIND 20FT/LATE(MPH) E 13 E 10 N 9
MIXING HGT(FT-AGL/MSL)5040 4880
TRANSPORT WND (MPH) SE 12 SE 5
VENT RATE (KT-FT) 50400 19520
DISPERSION 5 5
DSI 6 3 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-202000-
EASTERN INTERIOR-
330 AM AST MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 50 40 30
TEMP (24H TREND) 85 (+3) 67 (-3) 85
RH % (24H TREND) 60 (-8) 97 (+5) 58
WIND 20FT/EARLY(MPH) E 14 E 12 E 10
WIND 20FT/LATE(MPH) E 13 E 11 E 10
MIXING HGT(FT-AGL/MSL)5830 5790
TRANSPORT WND (MPH) E 13 E 8
VENT RATE (KT-FT) 64130 40530
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-202000-
LUQUILLO MOUNTAIN RANGE-
330 AM AST MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 40 20
TEMP (24H TREND) 80 (+2) 65 (-4) 80
RH % (24H TREND) 65 (-7) 99 (+4) 62
WIND 20FT/EARLY(MPH) E 12 E 10 E 8
WIND 20FT/LATE(MPH) E 12 E 9 E 8
MIXING HGT(FT-AGL/MSL)5140 4780
TRANSPORT WND (MPH) E 15 E 8
VENT RATE (KT-FT) 66820 33460
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-202000-
CENTRAL MOUNTAIN RANGE-
330 AM AST MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 70 20 70
TEMP (24H TREND) 83 (+4) 63 (-3) 83
RH % (24H TREND) 62 (-10) 96 (+3) 60
WIND 20FT/EARLY(MPH) E 9 E 6 E 5
WIND 20FT/LATE(MPH) E 9 E 6 NE 6
MIXING HGT(FT-AGL/MSL)5720 6490
TRANSPORT WND (MPH) E 10 E 3
VENT RATE (KT-FT) 51480 19470
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-202000-
CAYEY MOUNTAIN RANGE-
330 AM AST MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 40 40 40
TEMP (24H TREND) 80 (+2) 66 (-2) 81
RH % (24H TREND) 65 (-8) 99 (+4) 62
WIND 20FT/EARLY(MPH) E 11 E 9 E 8
WIND 20FT/LATE(MPH) E 11 E 9 E 8
MIXING HGT(FT-AGL/MSL)5240 5150
TRANSPORT WND (MPH) E 15 E 8
VENT RATE (KT-FT) 68120 36050
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-202000-
VIEQUES-
330 AM AST MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 30 20
TEMP (24H TREND) 85 (0) 73 (-2) 85
RH % (24H TREND) 58 (-2) 85 (+1) 56
WIND 20FT/EARLY(MPH) E 18 E 16 E 12
WIND 20FT/LATE(MPH) E 14 E 14 E 9
MIXING HGT(FT-AGL/MSL)4130 3540
TRANSPORT WND (MPH) E 23 E 14
VENT RATE (KT-FT) 82600 42480
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-202000-
CULEBRA-
330 AM AST MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 20 20
TEMP (24H TREND) 87 (+1) 74 (-2) 87
RH % (24H TREND) 57 (-4) 86 (+4) 54
WIND 20FT/EARLY(MPH) E 18 E 16 E 12
WIND 20FT/LATE(MPH) E 14 E 16 E 9
MIXING HGT(FT-AGL/MSL)4190 3450
TRANSPORT WND (MPH) E 22 E 15
VENT RATE (KT-FT) 79610 44850
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-202000-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 AM AST MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 10 20 60
TEMP (24H TREND) 89 (+2) 69 (-3) 88
RH % (24H TREND) 49 (-12) 89 (+2) 48
WIND 20FT/EARLY(MPH) E 18 E 16 E 12
WIND 20FT/LATE(MPH) SE 19 E 14 SE 13
MIXING HGT(FT-AGL/MSL)5150 5140
TRANSPORT WND (MPH) E 17 E 9
VENT RATE (KT-FT) 77250 41120
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-202000-
SAINT THOMAS AND SAINT JOHN-
330 AM AST MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 20 10
TEMP (24H TREND) 85 (+1) 73 (-3) 85
RH % (24H TREND) 58 (-4) 86 (+5) 56
WIND 20FT/EARLY(MPH) E 18 E 16 E 13
WIND 20FT/LATE(MPH) E 14 E 16 E 9
MIXING HGT(FT-AGL/MSL)4060 3540
TRANSPORT WND (MPH) E 23 E 15
VENT RATE (KT-FT) 81200 46020
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-202000-
ST CROIX-
330 AM AST MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 20 10
TEMP (24H TREND) 86 (+1) 72 (-4) 86
RH % (24H TREND) 59 (-4) 87 (+4) 58
WIND 20FT/EARLY(MPH) E 17 E 14 E 11
WIND 20FT/LATE(MPH) E 14 E 14 E 9
MIXING HGT(FT-AGL/MSL)4770 4500
TRANSPORT WND (MPH) E 18 E 9
VENT RATE (KT-FT) 76320 36000
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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